traffic congestion...

Here is an update to the congestion element of the tool. You can drag one or many locators onto the road and position them on lanes to restrict traffic flow. For this example I added a couple of boxes as a simulated accident that the traffic tries to get around.

bTraffic opposing roads...

Here's a bTraffic update on a few bits I added just before xmas and just after new year.
This version now has opposing road generation so you can set up a motorway/freeway quickly and easily. You can now also change the lane widths and specify a separation value between the roads. It's using the same particle emitter to fuel each road but it will later let you set the weighting of how busy each is.